Bearing guard



Aug. 28, 194s.v

J. s. CARUTHERSY BEARING GuARb Filed 0012.4, 1943' INVENTOR.

' J LarzzZZlQfis Patented Aug. 28, 1945 UNITED STATES PATENT OFFICE BEARING GUARD Jacob S. Caruthers, Rand, W. Va. Application October 4, 1943, Serial No. 504,941

1 Claim.

This invention relates to liquid pumps of the rotary type, the primary object of the invention being to provide means for guarding the bearings of rotary pumps, against the detrimental effects of the liquid and acids being pumped.

. An important object of the invention is to provide means for directing liquidsbeing pumped, which usually include an acid content, away from the bearings, which would otherwise find its way into the shaft bearings and oil chamber of the main shaft of the pump, to damage the bearings and power shaft of the pump.

Another object of the invention is to provide a device of this character which may be readily positioned on the shaft housing of the pump, at one end thereof, eliminating the necessity of mak ing alterations in the construction of the pump, in order to install the attachment.

With the foregoing and other objects in view which will'appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawing:

Figure 1 is a longitudinal sectional view through a pump and power shaft, the shaft being equipped with the guard, constituting the present invention.

Figure 2' is a side elevational view of one end of the shaft housing, illustrating the guard as positioned thereon.

Figure 3 is a sectional view taken on line 3-3 of Fig. 2.

Referring to the drawing in detail, the reference character 5 designates the pump base, and the reference character 6 designates the pump supports which rise from the base 5, as clearly shown by Fig. l of the drawing.

may be made in The reference character I indicates the drive shaft housing, in which the bearings 8 are mounted, the bearings 8 being disposed adjacent to the ends of the housing.

The reference character 9 indicates the drive shaft of the pump which operates in the bearings 8, the drive shaft being supplied with a pulley l0 over which runs a suitable belt or other coupling for motor not shown, and by means of which power is transmitted from a source of power not shown, to the drive shaft 9. l

A threaded collar H is mounted on one end of the shaft 9 and engages the bearings 8 at one end of the drive shaft housing I, holding the shaft against movement longitudinally of the housing, in one direction.

Atthe opposite end of the housing, is another collar indicated at l2, which collar l2 engages the bearings at this end of the housing to hold the drive shaft in position.

The shaft also operates in the sleeve 13 which is shown as disposed between the bearings 8 at the ends of the drive shaft housing I.

'One end of the drive shaft housing I is closed by the cap M which is shown as bolted to the housing, by means of bolts l5.

At the opposite end of the housing, is a cap Ni which substantially closes this end of the housing. The inner surface of the cap it is inclined downwardly and away from the housing I, and overhangs the feed screw IT as shown by Fig. 1 of the drawing, so that liquid deposited thereon will drain away from the housing 1.

The feed screw I1 is secured to the drive shaft, and is formed with deep threads sopitched that they will feed liquid away from the bearing 8, should liquid being pumped, find its way along the pump shaft. Arranged at a point adjacent to one end of the feed screw l1 and secured to the shaft 9, is a disk 18 which is adapted to throw the liquid fed outwardly by the feed screw l1, away from the drive shaft.

The pump proper is i dicated by the reference character l9, and is shown as secured to one end of the drive shaft 9. The drive shaft 9 is further illustrated as operating in the sleeve 20, that in turn is mounted within the pump housing 2|, the connection between the sleeve and pump housing 2| being made fluid-tight, by means of the gaskets From the foregoing it will be seen that due to the construction shown and described, any liquid which may find its way along the sleeve 20, and which may pass onto the feed screw l1, will be fed outwardly away from the bearings 8, where the liquid will be picked up and thrown to points remote from the bearings, by means of the disk l8.

The bearing 8 will be protected against the effects of the liquid being pumped, which usually contain acids that destroy bearings and render the pump inoperative.

What is claimed is:

A guard adapted to direct liquid away from a shaft bearing, comprising a sleeve fitted on the shaft to rotate therewith, one end of the sleeve adapted to abut the outer end of the bearing, said sleeve having a spirally formed external groove pitched to feed liquid away from the bearing, a hollowcap encasing the groove in spaced relation therewith, said cap having a wide upper portion and a narrow lower portion formed with a drain opening, the wall of the wide upper portion being inclined inwardly toward the groove, and a disk secured to the shaft in spaced relation with the cap and groove portion, said groove and inclined wall of the cap adapted to direct liquid on to the disk away from the bearing, and said disk adapted to throw liquid away from the shaft by centrifugal force.

JACOB S. CARUTHERS. 

